/Engine/Source/Runtime/SlateCore/Public/Styling/ISlateStyle.h
aFMarginproperty.
const [FMargin](API\Runtime\SlateCore\Layout\FMargin) & GetMargin ( const [FName](API\Runtime\Core\UObject\FName) PropertyName, const ANSICHAR * Specifier, const [FMargin](API\Runtime\SlateCore\Layout\FMargin) & DefaultValue, const [ISlateStyle](API\Runtime\SlateCore\Styling\ISlateStyle) * RequestingStyle ) const